Simulation of vibrational sources and vibroacoustic transfer in wind turbine drivetrains

Ihlenburg, Frank; Zarnekow, Marc; Grätsch, Thomas

doi:10.1002/pamm.201900101

Cited by 3 publications

(1 citation statement)

References 2 publications

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“…The overall goal is to model and identify the acoustic transfer paths from vibrational sources, like the gear box, to radiating components of the turbine, like the blades or the nacelle cover. From this a further goal is to find efficient design measures to reduce the radiation of tonal noise, see Ihlenburg et al [1] and Zarnekow et al [2]. Despite the special focus on wind turbines, our approach is general and can be employed in other engineering applications as well where large-scale structures consisting of many components are considered.…”

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confidence: 99%

Development of large-scale finite element models for vibroacoustic analysis

Grätsch,

Zarnekow,

Ihlenburg

Proceedings of the Eleventh International Conference on Engineering Computational Technology

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The development and analysis of large-scale finite element models is an important step in engineering product development in order to obtain reliable and accurate solutions of the related physical problem. It is a particular challenge when either structures are very large and consist of many single components that are connected at interfaces, or when dynamic analysis is involved where a sufficient fine mesh resolution is required depending on the underlying frequency range.

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confidence: 99%

Development of large-scale finite element models for vibroacoustic analysis

Grätsch,

Zarnekow,

Ihlenburg

Proceedings of the Eleventh International Conference on Engineering Computational Technology

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A hybrid analytical-numerical method based on Isogeometric Analysis for determination of time varying gear mesh stiffness

Beinstingel

Keller²,

Heider³

et al. 2021

Mechanism and Machine Theory

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A Hybrid Multistep Procedure for the Vibroacoustic Simulation of Noise Emission from Wind Turbines

2022

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This paper proposes an efficient hybrid analytical-computational approach for the simulation of mechanical vibrations and sound radiation in wind turbine drive trains.The computational procedure encompasses the detailed modeling of vibrational sources and structural sound paths as well as the major panels of airborne noise radiation. The angle-varying mesh stiffness is obtained from a series of quasi-static finite element simulations. A novel procedure is proposed to obtain the time-varying mesh stiffness at fluctuating speed. The varying mesh stiffness is introduced as a parametric excitation in an analytical gear model, and the Fourier-transformed results are used as vibrational sources in a finite-element-based harmonic response analysis of the drive train. The present paper focuses on the modeling of gear contact and gearbox vibrations. The models and procedures are outlined, and computational results are compared to physical measurements on a 2.5 MW wind turbine. The results are in good qualitative agreement at tonal frequencies. This is particularly the case at fluctuating speed, where both the simulation and the measurement show the characteristic effect of frequency modulation. The computational procedure has been expanded to the whole drive train and is effectively applied in the conception and evaluation of design measures for the reduction of tonal amplitudes.

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Simulation of vibrational sources and vibroacoustic transfer in wind turbine drivetrains

Cited by 3 publications

References 2 publications

Development of large-scale finite element models for vibroacoustic analysis

Development of large-scale finite element models for vibroacoustic analysis

A hybrid analytical-numerical method based on Isogeometric Analysis for determination of time varying gear mesh stiffness

A Hybrid Multistep Procedure for the Vibroacoustic Simulation of Noise Emission from Wind Turbines

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